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Portfolio Fishing

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  • Friðrik Már Baldursson
  • Guðmundur Magnússon

Abstract

The optimal fishing pattern in a multi‐cohort fishery is determined using risk theory.Portfolio theory becomes applicable by treating different age groups of fish as different assets. A possibility set is derived using data on Icelandic cod fisheries. In the presence of risk aversion, it is shown that the abrupt behavior found in deterministic models is changed towards a smoother fishing pattern. The historical selection pattern for the Icelandic cod stock is shown to be near optimal using a maximal effort‐type cost function, but historical levels of effort are inefficient and lead to less profit and greater fluctuations than implied by profit or utility maximization.

Suggested Citation

  • Friðrik Már Baldursson & Guðmundur Magnússon, 1997. "Portfolio Fishing," Scandinavian Journal of Economics, Wiley Blackwell, vol. 99(3), pages 389-403, September.
    • Handle: RePEc:bla:scandj:v:99:y:1997:i:3:p:389-403
    DOI: 10.1111/1467-9442.00070
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    Cited by:

    1. Sanchirico, James N. & Smith, Martin D. & Lipton, Douglas W., 2006. "An Approach to Ecosystem-Based Fishery Management," RFF Working Paper Series dp-06-40, Resources for the Future.
    2. Frank Krysiak, 2009. "Sustainability and its relation to efficiency under uncertainty," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 41(2), pages 297-315, November.
    3. Edwards, Steven F. & Link, Jason S. & Rountree, Barbara P., 2004. "Portfolio management of wild fish stocks," Ecological Economics, Elsevier, vol. 49(3), pages 317-329, July.
    4. Jean-Pierre Aubin & Luxi Chen & Marie-Hélène Durand, 2013. "Dynamic decentralization of harvesting constraints in the management of tychastic evolution of renewable resources," Computational Management Science, Springer, vol. 10(4), pages 281-298, December.
    5. Sanchirico, James N. & Smith, Martin D., 2003. "Trophic Portfolios In Marine Fisheries: A Step Towards Ecosystem Management," 2003 Annual meeting, July 27-30, Montreal, Canada 22191, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
    6. Sanchirico, James N. & Smith, Martin D. & Lipton, Douglas W., 2008. "An empirical approach to ecosystem-based fishery management," Ecological Economics, Elsevier, vol. 64(3), pages 586-596, January.

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